使用Python访问交易平台的API

Question

我刚开始使用API和Python获取数据。我想从我的交易平台中提取数据。他们提供了以下说明：

http://www.questrade.com/api/documentation/getting-started

我可以完成步骤4，并有一个访问令牌。我需要第五步的帮助。我如何翻译这个请求：

GET /v1/accounts HTTP/1.1
Host: https://api01.iq.questrade.com
Authorization: Bearer C3lTUKuNQrAAmSD/TPjuV/HI7aNrAwDp

进入Python代码？我已经试过了

import requests
r = requests.get('https://api01.iq.questrade.com/v1/accounts', headers={'Authorization': 'access_token myToken'})

我读了这个后尝试：Python请求与身份验证（access_token）

任何帮助都将不胜感激。谢谢

Answer 1

改进彼得的回复（谢谢彼得！）首先使用从QT网站获得的令牌获得access_token并获得分配来处理请求的api_server。

# replace XXXXXXXX with the token given to you in your questrade account

import requests

r = requests.get('https://login.questrade.com/oauth2/token?grant_type=refresh_token&refresh_token=XXXXXXXX')

access_token = str(r.json()['access_token'])
refresh_token= str(r.json()['refresh_token']) # you will need this refresh_token to obtain another access_token when it expires
api_server= str(r.json()['api_server'])
token_type= str(r.json()['token_type'])
api_server= str(r.json()['api_server'])
expires_in = str(r.json()['expires_in'])

# uri = api_server+'v1/'+[action] - let's try checking the server's time:
uri = api_server+'v1/'+'time'
headers = {'Authorization': token_type +' '+access_token}
# will look sth like this
 
#    headers will look sth like    {'Authorization': 'Bearer ix7rAhcXx83judEVUa8egpK2JqhPD2_z0'}
#        uri will look sth like    'https://api05.iq.questrade.com/v1/time'

# you can test now with
r = requests.get(uri, headers=headers)
response = r.json()
print(response)

Answer 2

正如您所指出的，在步骤4之后，您应该已收到如下访问令牌：

{
    “access_token”: ”C3lTUKuNQrAAmSD/TPjuV/HI7aNrAwDp”,
    “token_type”: ”Bearer”,
    “expires_in”: 300,
    “refresh_token”: ”aSBe7wAAdx88QTbwut0tiu3SYic3ox8F”,
    “api_server”: ”https://api01.iq.questrade.com”
}

要进行后续API调用，您需要按如下方式构造URI：

uri = [api_server]/v1/[rest_operation]

e.g.
uri = "https://api01.iq.questrade.com/v1/time"

Note: Make sure you use the same [api_server] that you received in your json object from step 4, otherwise your calls will not work with the given access_token

接下来，按如下方式构造标题：

headers = {'Authorization': [token_type] + ' ' + [access_token]}

e.g.
headers = {'Authorization': 'Bearer C3lTUKuNQrAAmSD/TPjuV/HI7aNrAwDp'}

最后，请按以下方式拨打您的请求电话

r = requests.get(uri, headers=headers)
response = r.json()

希望这有帮助！

注意：你可以在GitHub上找到一个Questrade API Python包装器，它可以为你处理所有上述内容。https://github.com/pcinat/QuestradeAPI_PythonWrapper